| US 7,513,882 B2 | ||
| Extracorporeal blood processing methods with multiple alarm levels | ||
| Thomas J. Felt, Boulder, Colo. (US); and Marlene Adele Bainbridge, Golden, Colo. (US) | ||
| Assigned to CaridianBCT, Inc., Lakewood, Colo. (US) | ||
| Filed on Sep. 08, 2006, as Appl. No. 11/530,111. | ||
| Application 11/530111 is a division of application No. 10/681035, filed on Oct. 08, 2003, granted, now 7,169,352. | ||
| Application 10/681035 is a continuation in part of application No. 09/746987, filed on Dec. 22, 2000, granted, now 6,899,691, filed on May 31, 2005. | ||
| Claims priority of provisional application 60/171932, filed on Dec. 22, 1999. | ||
| Prior Publication US 2007/0004997 A1, Jan. 04, 2007 | ||
| Int. Cl. A61M 37/00 (2006.01); C02F 1/44 (2006.01) | ||
| U.S. Cl. 604—6.01 [604/4.01; 604/5.01; 604/6.04; 604/6.11; 210/645; 210/741; 210/782] | 6 Claims |
| 1. A method for controlling an apheresis system comprising:
sensing pressure in the system;
triggering a first alarm condition in response to a sensed specified pressure drop to less than or equal to a specified pressure
in the system, said first alarm condition comprising pausing fluid flow in at least a portion of said system for a specified
delay time;
if plasma and platelet collection is incomplete, triggering a second-level alarm condition in response to a specified number
of said specified pressure drops within a specified period, said second alarm condition comprising reducing flow rate of fluid
in said system;
if plasma and platelet collection is complete, triggering a third-level alarm condition in response to a selected number of
said selected pressure drops within a specified period, said third-level alarm condition comprising stopping all pumps.
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